(57) An ultrasonic scanning device for examination of viscera comprises a control section
(1) containing an electric motor 123) for scanning by ultrasonic beams, a flexible
insertion section (2) connected to the control section (1), a chamber (8) provided
in the distal end portion (5) of the insertion section (2), a scanning mechanism (9)
provided in the chamber (8) to scan a viscus by ultrasonic beams sent forth from the
vibrator (11), an axially extending hole (19) which is formed in the insertion section
(2) for communication with the chamber (8) and into which a flexible rotation torque-transmitting
linear member (28) is inserted to connect the motor (23) to the scanning mechanism
(9), a seal member (261 for tightly sealing the lateral wall of the control section
(1), and a liquid (38) filled in the chamber (8) and axially extending hole (19).
The application of the linear member (28) has the advantage of enabling the insertion
section (2) to be reduced in outer diameter, rendered flexible and easily inserted
into a coeliac cavity. Further, the flow of the liquid (38) from the chamber (8) to
the axially extending hole (19) reduces the rotation torque of the scanning mechanism
(9).
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